Neve - Test tone RINGING in CHASSIS ???

PLEASE HELP.

I'm calibrating my new Neve 1272 mic pre with a .5vPP 1k test tone.
http://www.groupdiy.com/index.php?topic=19648

It's very strange but I can hear the tone in the chassis :shock:

I can't tell which part of the circuit it's coming from... Power supply, OT, I don't know. It changes volume when I do.

Is this right ?
& if not, what could it be?
How can I fix it?

Thanks,
Kevin

that's the in/out trafo, they usually talk,

M.

[quote author="mik"]that's the in/out trafo, they usually talk,

M.[/quote]

Really? Wow, never heard that before. :grin:

The more I listened it sounded like the OT.
Does this just happen to the Neve trannys or others too?

Thank You,
Kevin

generally it happens more or less in every trasformer coupled amp, I guest, But in same cases it shold be a sympton of a "not so well behaviour " do you have grounded it right ? I mean linking the coil screen on ground path.

if you test outcome right don't warry about it.

M.

It is the Output transformer (at least in my Neve clone)

I've only heard it when putting in very loud tones, or with lots and lots of gain producing a very high output. With typical use I don't hear it.

[quote author="khstudio"]Does this just happen to the Neve trannys or others too?[/quote]
I have only had it with Neve outputs yet

It's the Transformer Monster :twisted: , hungry for more voltage.

That's why they wind those things so tight. It;s not the lams, they don't do much past 1 K.
So that leaves....the'''''''''''''''''''''''''''''output caps, but there arebn't any, so that leaves the...................XFMR..................

...........


Windings.

I knew as soon as people started talkin bout the cool varnish smell thatn they din't pt enough fixer in the tank.

No wait, fixer is Kodak land, right?

Out the arse as uz-u-Al.

[quote author="CJ"]That's why they wind those things so tight. It;s not the lams, they don't do much past 1 K.
So that leaves....the'''''''''''''''''''''''''''''output caps, but there arebn't any, so that leaves the...................XFMR..................

...........


Windings.

I knew as soon as people started talkin bout the cool varnish smell thatn they din't pt enough fixer in the tank.

No wait, fixer is Kodak land, right?

Out the arse as uz-u-Al.[/quote]

You are the TRUE Riddler :razz:

I read your post 3x & still can't connect the dots

You are the tranny master... speak in english & help me out brother.

Is this normal or is somthing wrong?

Thanks,
Kevin

[quote author="khstudio"]
You are the tranny master... [/quote]

Be careful who you say that to, Kevin. :razz:

:grin: Rodabod!

It's normal.

Let it sing. Or Bleed, or Whatever.

It's Friday, because I get tomorrow off, suckers!
:guinness:

[quote author="rodabod"][quote author="khstudio"]
You are the tranny master... [/quote]

Be careful who you say that to, Kevin. :razz:[/quote]

I'm in trouble now :green:
It's friday for me too :guinness: :guinness: :guinness:

Thanks CJ,
Kevin